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Proceedings Paper

Improved cutback method measuring beat-length for high-birefringence optical fiber by fitting data of photoelectric signal
Author(s): Zhi-Dong Shi; Jian-Qiang Lin; Huan-Huan Bao; Shu Liu; Xue-Nong Xiang
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Paper Abstract

A photoelectric measurement system for measuring the beat length of birefringence fiber is set up including a set of rotating-wave-plate polarimeter using single photodiode. And two improved cutback methods suitable for measuring beat-length within millimeter range of high birefringence fiber are proposed through data processing technique. The cut length needs not to be restricted shorter than one centimeter so that the auto-cleaving machine is freely used, and no need to carefully operate the manually cleaving blade with low efficiency and poor success. The first method adopts the parameter-fitting to a saw-tooth function of tried beat length by the criterion of minimum square deviations, without special limitation on the cut length. The second method adopts linear-fitting in the divided length ranges, only restrict condition is the increment between different cut lengths less than one beat-length. For a section of holey high-birefringence fiber, we do experiments respectively by the two methods. The detecting error of beat-length is discussed and the advantage is compared.

Paper Details

Date Published: 22 February 2008
PDF: 9 pages
Proc. SPIE 6622, International Symposium on Photoelectronic Detection and Imaging 2007: Laser, Ultraviolet, and Terahertz Technology, 662216 (22 February 2008); doi: 10.1117/12.790822
Show Author Affiliations
Zhi-Dong Shi, Shanghai Univ. (China)
Jian-Qiang Lin, Guangxi Institute of Technology (China)
Huan-Huan Bao, Shanghai Univ. (China)
Shu Liu, Shanghai Univ. (China)
Xue-Nong Xiang, Shanghai Univ. (China)


Published in SPIE Proceedings Vol. 6622:
International Symposium on Photoelectronic Detection and Imaging 2007: Laser, Ultraviolet, and Terahertz Technology

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